B&C 18 TBX 46
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 31 Hz |
| Qts | 0.277 |
| Qes | 0.3 |
| Qms | 3.6 |
| Vas | 270 L |
| Sd | 1134 cm² |
| Xmax | 9 mm |
| Re | 5.1 Ω |
| Bl | 24.1 T·m |
| Mms | 176 g |
| Pe | 1000 W |
| Sensitivity | 98.2 dB |
Alignment hint
| EBP | 103 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 48.9 L |
EBP > 100: favours a ported (bass-reflex) alignment.
Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.
Substitute candidates
| Driver | Fs (Hz) | Qts | Vas (L) | Xmax (mm) | Sens (dB) | Fit | Notes | Compare |
|---|---|---|---|---|---|---|---|---|
| RCF LF18G401 | 33 +2 | 0.29 +0.01 | 268 -2 | 9 = | 98 -0.2 | close | + | |
| RCF LF18G908 | 33 +2 | 0.29 +0.01 | 268 -2 | 9 = | 98 -0.2 | close | + | |
| B&C 18NW100 | 31 = | 0.26 -0.02 | 252 -18 | 9 = | 98 -0.2 | close | + | |
| 18 Sound 18LW1400 | 31 = | 0.29 +0.01 | 297 +27 | 9 = | 98 -0.2 | close | + | |
| RCF LF18N401 | 32 +1 | 0.26 -0.02 | 257 -13 | 9 = | 98 -0.2 | close | + | |
| 18 Sound 18NLW9400 | 33 +2 | 0.26 -0.02 | 268 -2 | 9.5 +0.5 | 98 -0.2 | close | + | |
| 18 Sound 18LW1251 | 35 +4 | 0.27 -0.01 | 268 -2 | 9 = | 98 -0.2 | close | + | |
| Beyma 18PW1400/FE | 32 +1 | 0.273 = | 228.9 -41.1 | 9.1 +0.1 | 98.3 +0.1 | close | + | |
| B&C 18 NW 100 | 31 = | 0.254 -0.02 | 252 -18 | 8.7 -0.3 | 98.4 +0.2 | close | Xmax 8.7 mm < 9 mm: lower excursion-limited SPL | + |
| RCF LF 18N401 | 32 +1 | 0.259 -0.02 | 257 -13 | 8.8 -0.2 | 98.9 +0.7 | close | Xmax 8.8 mm < 9 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 18 TBX 46 →
Ranked on parameter similarity only (Qts, Fs, Vas, Xmax, sensitivity). Same nominal size required. A hint, not a simulation, model the swap before cutting or buying.
Used in enclosures (0)
No enclosure in the catalog uses this driver yet.